/ Dictionary / Index E equation movement: Meaning and Definition of Find definitions for: equa'tion move"ment Pronunciation: [key] — Horol. Horol. a movement in certain clocks for driving a hand that shows the relation of the mean day of 24 hours to the length of the current solar day. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. equational verb equation of motion Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language